DAX Orphan Records Count Measure

Counts fact rows whose key doesn't exist in the related dimension table, indicating a broken relationship.

Data Quality and GovernanceAdvancedorphan recordsreferential integritydata quality

DAX code

Orphan Records Count =
VAR FactKeys = VALUES('Sales'[ProductID])
VAR DimensionKeys = VALUES('Product'[ProductID])
RETURN
    COUNTROWS(EXCEPT(FactKeys, DimensionKeys))

Notes

A non-zero result usually means the dimension table is missing rows, or the fact table has bad/unmapped keys.

Requirements

How to use this measure

  1. In Power BI Desktop, select the table that should hold the measure and choose New measure on the ribbon.
  2. Paste the code, then replace the placeholder table and column names with your own. The My table names fields above do this for you.
  3. Run it through the DAX Formatter if you want it laid out in your team's style.

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More DAX resources

Browse all 175 measures in the Power BI DAX Measures Library, or search the library for something similar to Orphan Records Count.